using the internet I found the following information:
John Reiff rode Orby when he won the Derby. (John Reiff 1898-1914) John Reiff rode a lot in France, also.
The owner of Orby: Richard Eyre Crocker(1845-1922) Irish American and NY City political Tammany boss - well known.
He owned Glencairn, Sandyford, Dublin, Ireland - a beautiful estate - one of the greatest.
"he moved Orby from the Curragh to train there under James Allen and Lt. Col. Freddie MacCabe, his racing manager."
"the following year Crocker and James Allen won the 1,000 guineas at Newmarket with Rhodora, Orby's half-sister."
I have written an e-mail to the National Museum of Racing to see if we can get a response. There was info at that site abut Irish Derby Racing. I'll let you know if I hear back sometime - probably next week or so during daylight hours.